Patch "drm/i915: Flag the execlists context object as dirty after every use" has been added to the 4.1-stable tree

This is a note to let you know that I've just added the patch titled

drm/i915: Flag the execlists context object as dirty after every use

to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-i915-flag-the-execlists-context-object-as-dirty-after-every-use.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Chris Wilson <[email protected]>
Date: Fri, 14 Aug 2015 12:59:19 +0100
Subject: drm/i915: Flag the execlists context object as dirty after every use

From: Chris Wilson <[email protected]>

commit 903ecd0bb970438c3a60c2c33ec9032d6443bf67 upstream.

Everytime we use the logical context with execlists it becomes dirty (as the hardware will write the new register values afterwards, as well as the GPU state that will be used). We need to then flag the context as dirty everytime since after a swap-out/swap-in cycle the dirty flag will be cleared, and a further swap-out cycle will then loose the most recent GPU state.

---
 drivers/gpu/drm/i915/intel_lrc.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -848,6 +848,8 @@ static int intel_lr_context_pin(struct i
 		ret = intel_pin_and_map_ringbuffer_obj(ring->dev, ringbuf);
 		if (ret)
 			goto unpin_ctx_obj;
+
+		ctx_obj->dirty = true;
 	}
 
 	return ret;

Patches currently in stable-queue which might be from [email protected] are

queue-4.1/drm-i915-flag-the-execlists-context-object-as-dirty-after-every-use.patch